This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A228326 #10 Aug 26 2013 17:12:57 %S A228326 0,1,2,3,4,5,6,7,8,9,87,65,43,21,23,45,67,89,876,54,32,10,12,34,56,76, %T A228326 78,98,765,432,101,210,121,212,123,232,321,234,323,434,343,454,345, %U A228326 456,543,2101,2121,2123,2321,2323,2343,2345,654,545,656,565,676,567 %N A228326 Start with 0. Successive digits in the sequence must differ by 1. Adjoin the smallest number not yet in the sequence. %C A228326 Is the sequence infinite? %C A228326 Yes, as for any digit d, there are infinitely many terms in A033075 with leading digit d+1 or d-1. - _Paul Tek_ Aug 25 2013 %D A228326 Eric Angelini, Posting to the Sequence Fans Mailing List, Aug 23 2013. %H A228326 Paul Tek, <a href="/A228326/b228326.txt">Table of n, a(n) for n = 1..10000</a> %H A228326 Paul Tek, <a href="/A228326/a228326.txt">PERL program for this sequence</a> %Y A228326 Cf. A228327, A228328, A033075. %K A228326 nonn,base %O A228326 1,3 %A A228326 _N. J. A. Sloane_, Aug 24 2013